Flow-controlling mechanism.



J. W, LEDUUX.

FLOW CONTROLLING MECHANISM. V APPLICATION FILED 1 313.4, 1909. 353 4 Patented May 30, 1911.

2 SHEETSSHEBT 1.

citizen of the UNITED STATES (mm.-

- rorm w. mpoux,

or swnnrmonn, PENNSYLVANIA.

FLOW-CONTROLLING MECHANI SM.

Specification of Letters Eaten; Patented 30, I 1911.

Application filed February 4; 1509. Serial m. 475,974. 7

To all whom it may concern:

Be it known that I, JOHN United States, residing at Swarthmore, in the county of Delaware and State of Pennsylvania, have invented oer-y tain Improvements in Flow-Controlling Mechanism, of which the following is a speci- In the drawings, Figure 1; is a sectional elevation of apparatus embodying my. im

provements; Fig. 2 isatop plan view of ing desired, by

part of the apparatus shown in Fig. 1; and Fig. 3 is a side elevation of .the mechanism shown in Fig. 2. The apparatus represented in the drawings comprises the conduit 1 having the Sections 2 and 3 tapering to the throat 4 and forming a Venturi' section. A valve casing 5 is placed in the conduit and a gate valve (3 is moved therein by a stem 7 having'a screw thread 8. A bracket 9 on the valve casing 5 has journaled in the bearing 10 thereof the hub 11 of a worm wheel 12, the hub engaging the threaded section of the stem which it is adapted to inove longitudinally. The bracket 9-has the bearings 13 in which is journaled a shaft 14 provided with a worm 15 12 to'rcvolve it.

A casing 16 has thereon the bearings 17 in which the shaft 14 is journaled and fixed on the shaft within the casing is a wheel 18 provided with lhe vanes l9 and 20, the easing having thereon the nozzles 21 and 22 for communicating, lluid pressure to the respective sets of vanes. A fluid pressure pipe 23 is connected by a valve 24 with pipes 25 and 26 which are connected with the respective nozzles 21 and 22.

The pipe 25 contains a rotary valve 27, which is normally opened by a weight 29 and closed by an arm 30, both secured to the stem thereof. The arm 30 is operated, to effect the gradual closure of the valve 27 as the valve (iapproaches'the maximum 0 na screw 31 which is ad ustengagiug the worm wheel wherein a. valve is autoa conduit, by difierential pressures:

as a a yoke'.32 as to the stem 7. The

regardless; of the position of the valve '24, 'on the stopping of the valve 6 its opening movement. The pipe 26 contains at the limit of a rotary valve 33 bye weight 34 and closed by'an arm '35, both fixedf-to the valve stem thereof. The arm 35 is actuated, to cause the. gradual closure of the .lvalve :33 as'the valve6 approaches the limit of its-closingmovement, bya set screwBG adjustable in the yoke 32, hence the vim act on the vane" wheel is reduce as the valve 6 approaches position !est', era.dudlly independently of the position of the valve 24.

the'stem thereof which is engaged bya reciproeating rack 38 carried by a rod .89, T e lower end of the rod 39' extends into the ,thereof and is fixed duit 1 and the chamber 44 is connected by a pipe 46 with the throat 4 of the Venturi section 1, the pipe containing valves 47 and -t8 and the pipe 46 the valve 49 for re lating purposes. The rod 39 is connect the short arm of a scale beam 50 fulcrumed arm thereof the adjustable poise 52, by

by are counterbalanced, and, the resultant pressure required for moving the diaphragm 42 and throwing the valve 24 can be regulated.

When there is no flow in the conduit 1, equal pressures are communicated from the norma through lherespective ducts 45- and-46 to the diaphragm 42 is held in-its sition by the action of the counterpoise 52 thrmlgh the beam 50 andthe rod 39, and the 25 and open the duct 26 of the ran-I638 and pinion 37. With the duct 25-closed and the duct 26 open, pressui 'e is commimicated through the latter, from the duct 23, to the vanes 20 of the wheel, 18 and gadually e closed diaphragm casing 40 through the way 41;

to the diaphragm 42 which forins with the casing the chambers 43 and 44. The chamb r 43'is connected by a pipe 45 with a normal. section of the con gradual closing of the valve 27 gradually tag I uces the fluid impact upon thevane wheel,

so. whereby shock is avoided-tov the apparatus which is normally-held in the openjposition.

with i and contracted sections thereof.

and the apparatus is brought to The valve 24 is operated by a pihion 37 .on

on the bearing 51 and having on the logg which the rod and mechanism carried therethe res 'a-ctive. pressure chambers 43 and 44,

highest povalve 24 is held in position to close the duct through the action .o

7 is communicated through the duct to the 15.

the 'worm shaft 14, worm wheel 12 and IQ I 993,384

the wheel acts through the wormshaijt 14 Worm ivheel l2 and threaded -stein 7 toholdopen the valve 6. A

- When the flowin the CQHdlllhl reaches-a.

predetermined rate, .so that the pressure" communicated through the duct is en ugh; greater than the pressure communicated through theduet $6 to move the diaphragm against the action of the counterbalance mechanism, the downward movement of'the rod 39-;causes the rack 38 and pinion 37 170 throw the valve 24 so that pressure from 'the' duct 23 to the duct-26 is cut off and pressure vanes'19 of the wheel 18,- Which acts through lthleadedstem 7 to close the valve It will be nnderstoodthat by the forcgo-' ing actions the fiowthrough the conduit is automatically regulated, and that by adjust-- 'ing the poi ethe resultant pressure'or'rate to o crate the auxiliary valve when'a'crtain:

pic I eterinined iate' is attained, it will .be

'seen'that'the'po'sitims 'ofthe auxiliary valve and the, flow through the respective ducts; controlled thereby will be functions of thenormal flew "through tlie. conduit." the movement of the vane whcel is efi'ected by" the resultant'pressure communicated thereto by way of the ducts, when thepressur'es corn-r mimicated or rates of flow through-these .ducts are equal the wheel will be in estate "of equilibrium and the main valve will be held" in fisition'to permit the desired rate af e "'Havingdescrib'ed my invention, I claim: *ltf'IiYcombination with ac'onduit having,

ough the conduit.

ing tivo sets o vanes whereby it is revoluble n reverse' directions, means whereby said if heel operates said valve, ducts' for projecti ho. Er? y 4 inqfiuida ainst the respective sets of vanes, va veimec' anism .for icoiitrollmg'jhg flow throughsaid ducts, a pressure chamber, a

diaphragm said chaipbe yineans for carr'ying pressure froin'sa'id contracted section off-said con uitand a different section of said conduit to" said pressure chamber on opposite sides of said diaphragm, and means whereby said diaphra m regulates the posi tion of said valve'nic anism.

2. In combination with a'conduit,,a valve for controlling the flow .throughsaid conduit, a vanewhecl, means whereby-{said vane wheel operates said valve, a duct for carrying fluid to said vane wheel, a valve in said duct;- and means whereby'said'-valve first v named'a's it approaches alimit-of its movement gradually closes said'valve last named: 3. In combination with a conduit, a valve 7 forcontrolling said conduit, 11- stemfor operating' said valve, a vane"'wheel, means whereb said vane wheel-operates said stem, ducts onconveyin'g fluidtpressures to said wheel; valves for controlling'sa'idducts, and

means carried by .said stem for" operating said ,duct' valves alternately as said conduit 1 valve approaches; the respective limits of its movements- ,t is .t

4.111 combination with a conduit, valve for controlling said-.condi'lit, a stem for op- 'erat1 .n "said- -vaj lve,'- a-vane=wheel-,- means" where y'said-vane wheel,operatessaid stein,

ducts'for discharging fluid against the vanes 'Qof said Wheel "to revolve -it'in opposite directions, 'avalve for controlling each of-said ducts, automatic: mea'n's' forholding= said valves in the r normal positions, and means operatedhy said stem "for moving said valves alternateIy from said normal positions. "'In witnessfwhereof I have hereunto set rnyiiame this 3rd day ofFebruary, 1909, in V 'thejpresence of'the subscribingwitnesses. stemmed, section, a valve for controlling. Y

thli fiovv throu b said conduit,- a 'wheel hav- 

